Photocatalytic activity of Ca3Ti2O7 layered-perovskite doped with Rh under visible light irradiation

Yoshihiro Okazaki, Takahiro Mishima, Shunsuke Nishimoto, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The photocatalytic activities of layered-perovskite Ca3Ti2O7 doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca3Ti2O7 as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H2 evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca3Ti2O7 after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca3Ti2 - xRhxO7, showed higher stability in air than CaTi1 - xRhxO3, which consists of a simple perovskite structure.

Original languageEnglish
Pages (from-to)3337-3340
Number of pages4
JournalMaterials Letters
Issue number19
Publication statusPublished - Jul 15 2008


  • Catalysts
  • Perovskites
  • Photochemical technology
  • Rh-doping
  • Visible light response

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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